i have in my display adapters is Intel (R) UHD Graphics 630 & NVIDA GeForce RTX 2060
What is your driver version for your 2060
Open Nvidia control panel
Select HELP > System information
Driver version is listed on the right side.
Also in OBS
Go to Settings > Output
Change Output Mode to Advanced
Look for the GPU option and set this to 1
Possible that your IGPU is being used by OBS instead of your 2060.